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If tantheta+tan(theta+pi/3)+tan(theta-pi...

If `tantheta+tan(theta+pi/3)+tan(theta-pi/3)=ktan3theta` then k is equal to

A

1

B

`1//3`

C

3

D

none of these

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The correct Answer is:
D
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OBJECTIVE RD SHARMA-TRIGONOMETRIC RATIOS AND IDENTITIES-Chapter Test
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  16. If x=tan15^(@),y=cosec75^(@),z=4sin18^(@)

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